Air quality

The demolition of buildings at the Mt Eden site to make room for the tunnel portal

The project monitors and manages the impacts that building demolition, concrete cutting and other construction related activities can have on air quality

Visual inspections of dust are undertaken regularly to ensure mitigation techniques are working effectively with additional continuous monitoring implemented on-site.

Early on in the project, Contracts 1 and 2 switched from diesel generators to grid-connected transformers. This not only reduced GHG emissions, it also made the air cleaner by reducing diesel particulates. Link Alliance has also been working to do the same and now have grid-connected transformers at all their sites. Managing dust emissions while construction is underway can be challenging, particularly during dry, windy conditions. The team suppresses dust by spraying it with water. Hoardings and semi-permeable scrim are also erected around construction sites to manage dust.